[tor-bugs] #8795 [Tor]: Make #2077 survivable

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#8795: Make #2077 survivable
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 Reporter:  cypherpunks                                |          Owner:                     
     Type:  defect                                     |         Status:  needs_review       
 Priority:  normal                                     |      Milestone:  Tor: 0.2.4.x-final 
Component:  Tor                                        |        Version:  Tor: 0.2.4.12-alpha
 Keywords:  Tor, Permisson denied, getinfo_helper_dir  |         Parent:                     
   Points:                                             |   Actualpoints:                     
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Comment(by rransom):

 Replying to [comment:11 andrea]:
 > Replying to [comment:10 nickm]:
 > > gevalt! maybe I'd be better off just making the mmap or write fail by
 building a Tor where it always fails.
 >
 > Yeah, that could work too.  Alternately, maybe chown/chmod the file out
 from under it so it fails for permission reasons.

 That won't work -- file-access permission checks are normally done when a
 file is opened, not when a file descriptor is used.

 You could fill the filesystem so `write` returns `ENOSPC`, or unplug the
 disk so the OS starts reporting real errors immediately.  Or just find a
 way to test on Windows.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8795#comment:12>
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